VulnerabilityModified

CVE-2019-9636

Python 2.7.x through 2.7.16 and 3.x through 3.7.2 is affected by: Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization.

CRITICAL 9.8EPSS 8.81%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (8.81%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Python 2.7.x through 2.7.16 and 3.x through 3.7.2 is affected by: Improper Handling of Unicode Encoding (with an incorrect netloc) during NFKC normalization. The impact is: Information disclosure (credentials, cookies, etc. that are cached against a given hostname). The components are: urllib.parse.urlsplit, urllib.parse.urlparse. The attack vector is: A specially crafted URL could be incorrectly parsed to locate cookies or authentication data and send that information to a different host than when parsed correctly. This is fixed in: v2.7.17, v2.7.17rc1, v2.7.18, v2.7.18rc1; v3.5.10, v3.5.10rc1, v3.5.7, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.9, v3.6.9rc1; v3.7.3, v3.7.3rc1, v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.

CVSS 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 8.81% probability · 95th percentile
CISA KEV: Not listed
Affected: python/python · fedoraproject/fedora · opensuse/leap · debian/debian linux · canonical/ubuntu linux · redhat/openshift container platform · redhat/enterprise linux · redhat/enterprise linux desktop · redhat/enterprise linux eus · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux server tus · redhat/enterprise linux workstation · redhat/virtualization · oracle/sun zfs storage appliance kit
Source: cve@mitre.org

References

http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00092.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00097.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00024.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00050.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00042.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.htmlMailing List, Third Party Advisory
http://www.securityfocus.com/bid/107400Third Party Advisory, VDB Entry
https://access.redhat.com/errata/RHBA-2019:0763Third Party Advisory
https://access.redhat.com/errata/RHBA-2019:0764Third Party Advisory
https://access.redhat.com/errata/RHBA-2019:0959Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0710Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0765Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0806Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0902Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0981Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0997Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1467Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2980Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3170Third Party Advisory
https://bugs.python.org/issue36216Issue Tracking, Patch, Vendor Advisory
https://github.com/python/cpython/pull/12201Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/06/msg00022.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/06/msg00023.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00011.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/08/msg00034.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2ORNTF62QPLMJXIQ7KTZQ2776LMIXEKL/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/44TS66GJMO5H3RLMVZEBGEFTB6O2LJJU/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/46PVWY5LFP4BRPG3BVQ5QEEFYBVEXHCK/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4X3HW5JRZ7GCPSR7UHJOLD7AWLTQCDVR/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AEZ5IQT7OF7Q2NCGIVABOWYGKO7YU3NJ/

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.